There was no recorded wreck at this area so it was noted on the pertinent authorities, including the Receiver from the Wreck (RoW). U-31 evaded a unfold of 4 torpedoes fired by HMS Trident about 15 miles (24 km) south of Lorient and was then pressured to dive when fired https://griffinhyqep.worldblogged.com/40204074/u31-fundamentals-explained